JP2002062225A - Sampling nozzle for measuring of flue gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a condensed solid material and the blocking of an intake part, and to ensure smooth operation of a cleaning rod. SOLUTION: The intake part 1 fixed to a flue wall 51 of a flue 5 is connected to the intermediate part of a water supply part 3 and a sampling part 4, water is sprayed to exhaust gas sucked from an intake port 11 from a water sprinkle nozzle 31 installed in the upper water supply part 3, introduced into the lower sampling part 4, supplied to a gas measuring part (not illustrated) for composition analysis. A water spraying device 12 composed of a water spraying pipe 12a having drilled holes 12c and a water supply pipe 12b is installed as a water supply means for wetting with moisture the inner surfaces over from the vicinity 11 of the exhaust gas intake port to the intake part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement sampling nozzle used for gas analysis of flue gas, and more particularly to an improved structure capable of preventing nozzle blockage due to exhaust gas components.

[0002]

2. Description of the Related Art Conventionally, the components of flue gas from incinerators have been analyzed and monitored as required. In such a gas analysis, it is necessary to sample the exhaust gas, and a measurement sampling nozzle illustrated in FIG. 2 is used as an apparatus for this purpose. That is, a pipe structure having an upper portion serving as a water supply portion 3 and a lower portion serving as a sampling portion 4 is attached to the intake portion 1 attached to the pipe wall 51 of the flue 5 in an intersecting manner.

[0003] Sprinkling water from a sprinkling nozzle 31 provided in the water supply unit 3 causes the lower sampling unit 4 and lower piping (not shown) to be washed with water and to be sucked from the intake port 11 of the intake unit 1. The introduced exhaust gas receives water spray from the water spray nozzle 31 at the intersection, and is thereafter supplied to a gas measurement unit (not shown) through a pipe (not shown) provided at the lower end of the sampling unit 4. Things. On the other hand, the intake unit 1
The cylinder portion 2 for moving the cleaning rod 21 forward and backward is disposed on the opposite side of the cleaning rod 21.
By taking in and out, the inside of the intake unit 1 can be cleaned.

However, a phenomenon in which components contained in the combustion gas of the incinerated material are condensed and solidified as solids from the intake port 11 of the intake section 1 to the inside is observed. There is a problem that the intake unit 1 is blocked and measurement cannot be performed. This condensed solid has a considerable hardness and strength, and cannot be sufficiently removed at the pointed end 22 of the cleaning rod 21. Further, the condensed solid may hinder the smooth operation of the cleaning rod 21. There was a problem that the entire sampling nozzle had to be removed and disassembled and cleaned.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to prevent the above-mentioned condensed solids from being generated, to prevent the intake section from being clogged, and to perform cleaning. Provided is a flue gas measurement sampling nozzle capable of ensuring smooth operation of the rod 21.

[0006]

An object of the present invention is to provide a sampling nozzle for measuring exhaust gas which can be attached to a flue, in which the inner surface of the sampling nozzle is wetted with moisture in the vicinity of the exhaust gas intake to form a flow of water. The problem can be solved by the flue gas measurement sampling nozzle of the present invention, which is provided with a water supply means. The present invention is preferably embodied in a form in which the water supply means is a sprinkler. Further, in the present invention, it is particularly preferable that a cleaning rod having a pointed end disposed so as to be capable of moving forward and backward is provided in the vicinity of the exhaust gas intake of the exhaust gas measuring sampling nozzle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a sampling nozzle for measuring flue exhaust gas according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, the sampling nozzle for flue gas measurement of the present invention has a intake structure 1 attached to a pipe wall 51 of a flue 5, a pipe structure having an upper part as a water supply part 3 and a lower part as a sampling part 4. Is the same as the conventional one. That is, the intake section 1 is connected at an intermediate position between the water supply section 3 and the sampling section 4, and the exhaust gas sucked from the intake port 11 of the intake section 1 is provided to the upper water supply section 3 at the connection portion. The sprinkling water from the sprinkling nozzle 31 is supplied to a gas measuring unit (not shown) through a predetermined pipe (not shown), and component analysis is performed.

A feature of the present invention is that, as shown in FIG. 1, a water supply means which wets the inner surface of the exhaust gas from the vicinity of the exhaust gas intake port 11 to the intake section 1 to form a flow of water. In this embodiment, the sprinkler device 12 is provided in the intake unit 1. The sprinkling device 12 includes a sprinkling pipe 12a and a water supply pipe 1
2b, for example, when the intake portion 1 is a pipe with an inner diameter of about 100 mm, the watering pipe 12a is a stainless steel pipe having an inner diameter of 10 mm x a length of 250 mm and a plurality of 3 mm diameter drill holes 12c provided at intervals of 25 mm. And a stainless steel water pipe 1 with an inner diameter of 10 mm
2b is attached so that water can be supplied from outside.
It is sufficient that the drill holes 12c are provided so as to release the release water so as to wet the inner surface of the intake section 1 as uniformly as possible, and are arranged at appropriate positions and intervals.

According to this water supply means, when an appropriate amount of water is supplied from the water supply pipe 12b, water is discharged from the drill hole 12c provided in the water sprinkling pipe 12a, and from the vicinity 11 of the exhaust gas intake port, the water of the intake section 1 is discharged. Over the interior, wetting its inner surface, the excess moisture forms a stream of water.
Therefore, it is possible to reliably prevent the agglomerated components in the exhaust gas from aggregating and sticking and accumulating on the inner wall surface, and it is possible to eliminate a nozzle blockage accident. The water that has flowed down is discharged from a lower discharge hole (not shown). In addition, drill hole 1
Since it is not preferable for the water released from 2c to flow into the flue, the discharge direction and the discharge position are set in a required state in advance.

Although not shown in FIG. 1, a pointed end portion 22, which is provided so as to be able to move forward and backward, is provided inside the intake portion 1 of the sampling nozzle for exhaust gas measurement up to the vicinity of the exhaust gas intake port 11. Cleaning rod 21 having
It is particularly preferable to add the two as illustrated in FIG. In this case, as shown in FIG. 1, the cleaning rod 21 may be driven by the cylinder 2 on the opposite side of the intake unit 1 on the axis.

In this manner, since the inner surface of the intake section 1 is in a wet state as described above, the advancing and retreating operation of the cleaning rod 21 attached thereto is smooth, and it is deposited on various contaminants other than the coagulated solids. This also has the advantage that the sampling nozzle can be easily removed and the interval between disassembly and cleaning can be lengthened by removing the entire sampling nozzle. The attachment angle of the exhaust gas intake unit 1 to the flue pipe wall 51 is set to 15 ° or more, and the exhaust gas intake unit 1 is disposed at a downward slope toward the sampling unit 4 because the water spray from the water spray nozzle 12 is It is preferable because it can be prevented from flowing into the surface. In the above, the sampling nozzle having the cleaning rod 21 has been described as an example.
The present invention is not limited to the case where the cleaning rod 21 is provided, but can be effectively applied to, for example, a sampling nozzle of a cleaning system using an air purge.

The water supply means of the present invention is not limited to the water sprinkling device 12 formed by the water sprinkling pipe 12a and the water supply pipe 12b as illustrated in FIG. In addition to the sprinkling pipe 12, the sprinkling pipe 12 extends from the space 23 for accommodating the tip 22 of the cleaning rod to the intake section 1, as shown in FIG.
a is arranged so that the discharged water can be discharged to the entire surface. In this case, if the drilling hole 12d opened vertically downward is provided in the portion of the watering pipe 12a located in the space 23, the watering nozzle 31 described above can be provided.
Since the same water spraying effect as described above is achieved, the advantage that the installation of the water spray nozzle 31 can be omitted is obtained. In addition, as shown in FIG. 3, if the water sprinkling pipe 12a is attached to the cylinder part 2 mounting plate, the sprinkling pipe 12a can be easily attached and detached, and the whole water sprinkling device 12 can be easily cleaned. .

The target exhaust gas to which the sampling nozzle of the present invention is applied is most effective in the case of the above-mentioned combustion exhaust gas in which condensed solids are easily generated. In particular, in addition to sewage sludge incinerators, It works effectively when installed in the flue of a waste incinerator. Further, the flue in the present invention means a flow path of exhaust gas from an exhaust gas generation source to the atmosphere, and is not limited to a flue in a chimney for air release.

[0014]

The sampling nozzle for measuring flue gas of the present invention is constructed as described above.
It is possible to prevent the above-mentioned condensed solids from being generated, prevent the intake portion from being blocked, and also ensure the smooth operation of the cleaning rod 21, improve the cleaning effect, and lengthen the regular maintenance interval. Has an effect.
Therefore, the present invention has a very large industrial value as a sampling nozzle for measuring flue gas which has solved the conventional problems.

[Brief description of the drawings]

FIG. 1 is a cutaway sectional view of a main part of a sampling nozzle for flue gas measurement according to the present invention.

FIG. 2 is a cutaway sectional view of a main part of the conventional sampling nozzle.

FIG. 3 is a sectional view of a main part of one embodiment of the present invention.

[Explanation of symbols]

1 intake, 11 intake, 12 watering device,
12a watering pipe, 12b water supply pipe, 12c drill hole, 2 cylinder part, 21 cleaning rod, 22 point, 3 water supply part, 31 watering nozzle, 4 sampling part, 5 flue, 51 pipe wall.

Claims (3)

[Claims] 1. A sampling nozzle for measuring exhaust gas which can be attached to a flue, wherein a water supply means for forming a flow of water is provided in the vicinity of the exhaust gas intake port so as to wet the inner surface with moisture. Sampling nozzle for flue gas measurement. 2. A sampling nozzle for measuring flue gas according to claim 1, wherein said wetting means is a sprinkler. 3. The sampling nozzle for flue gas measurement according to claim 2, further comprising a cleaning rod having a pointed end disposed so as to be able to advance and retreat, near the exhaust gas inlet of the sampling nozzle for exhaust gas measurement.